I still have my Mid 2009 Mac book pro. Best Machine ever and still using it. I replaced the CD drive with an SSD and the performance in general of the computer

I still have my Mid 2009 Mac book pro. Best Machine ever and still using it. I replaced the CD drive with an SSD and the performance in general of the computer improved a lot. The only issue is that the battery is too old and only last 2 - 3 hours.